an item problem

[Dracula]

how do i make a new item with other different items
EX:
SteelBar+Sword=SteelSword
EX:
Dirt+Water+Seed=Tree lol

 

[qwerty]

use hero acquire an item and check if the hero has the required items. if he does, remove those items and give him a new one, if not, then dont do anything.